So yea, I'm looking for a sound system in the 150€ price range.I mainly listen to music, but it should be at least OK for watching movies too.I don't want headphones because I want to listen music with other people too from time to time.

Are there any best choices (like the AKG K601 would be, if I was looking for a headphone)?

I owned a pair as my first desktop multimedia speakers. They exceeded my expectations and I was delighted with them. At first. They broke down alarmingly quickly. When I checked the website for help I discovered it was a common occurrence. So I cut my losses and moved up market. This might not be an option for you or you could be mpre fortunate. Certainly worth a punt so long as you don't need them to last for a long time. I'd probably try the Fostex if I was in the same position again.

Alternatively I have heard good things about complete 2.1 systems from the likes of computer parts specialists such as Corsair and Logitech. You could just about squeeze in a little system with a sub for close to the money you have to spend. Good value. A sub if handy to flesh out the sound and if the booming isn't convenient, ie. late at night, you can turn it off.